Ineffabilis Deus - The Immaculate Conception: Apostolic Constitution issued by Pope Pius IX on 8 December 1854 www.catholic-forum.com/saints/bvm00013.htm
IQB: Aquinas and the Immaculate Conception - James Akin's explanation of Thomas Aquinas' views on the issue of Mary's sinlessness. www.cin.org/users/james/questions/q052.htm
MARIOLOGY - The Immaculate Conception - Article by Wade L. J. Menezes, C.P.M. in the November/December 2000 issue of Catholic Faith. www.catholic.net/RCC/Periodicals/Faith/2000-12/menezes.html
Orthodoxy and the doctrine of the Immaculate Conception - Article by Dave Brown on the Eastern Orthodox Church's views on the Immaculate Conception; from the Catholic Resource Network. www.ewtn.com/library/ANSWERS/imconcep.htm
The Immaculate Conception - Article by Rev Charles Dickson published in The Catholic Answer. net2.netacc.net/~mafg/mary03.htm
